Hydropower station unit internal environment anti-condensation simulation test device

Abstract

The utility model provides a hydropower station unit internal environment anti-condensation simulation test device, which comprises a temperature and humidity control environment box and a temperature-controllable circulating water tank, a cooling-water machine refrigerates water in the temperature-controllable circulating water tank, and two ends of the temperature and humidity control environment box are provided with a water inlet and a water outlet which are communicated with a test bearing water pipe. The temperature-controllable circulating water tank is connected with the water inlet and the water outlet through a water supply pipeline, the water supply pipeline is provided with a water pump, the outer side of the test bearing water pipe is provided with different test areas, the different test areas are coated with different anti-condensation coating samples, an electronic balance is arranged in the temperature and humidity control environment box corresponding to the test areas, and the electronic balance is provided with a condensation collecting disc. And the temperature and humidity control environment box is placed on the vibration platform. The device can simulate the anti-condensation performance of anti-corrosion samples of different processes in different environments.

Description

Technical Field

[0001] The utility model relates to the field of anti-corrosion process test for a turbine generator casing, in particular to an anti-condensation simulation test device for the internal environment of a hydropower station unit. Background Art

[0002] The tubular turbine generator is immersed in the river water as a whole, and the outer surface of the casing contacts the low-temperature river water. In summer, the air temperature in the casing is high and the relative humidity is high. In addition, the heat generated by the generator in the casing causes the temperature in the casing to continue to rise. Therefore, the water vapor content in the casing is also high. Under the action of heat conduction, the low temperature of the river water outside the casing causes the temperature of the inner surface of the casing to gradually decrease. When the water vapor generated by the high temperature and high humidity in the casing contacts the lower temperature inner surface of the casing and reaches the critical point of condensation, it changes from gas to liquid, forming condensation water droplets on the inner surface of the casing, that is, condensation occurs. Since the casing of the tubular turbine generator itself is in a sealed state, the generation of condensation aggravates the corrosion of the casing and the parts inside the casing, seriously affecting the operating safety and service life of the whole machine.

[0003] Therefore, it is necessary to spray anti-corrosion materials on the motor casing. The anti-corrosion materials can not only improve the anti-corrosion performance, but also have certain anti-condensation performance. For example, CN102518544B discloses an anti-condensation anti-corrosion structure and preparation process for a hydro-turbine generator casing. The treated inner and outer surfaces of the casing are subjected to anti-corrosion treatment, which has both anti-corrosion and thermal insulation effects. It can effectively prevent condensation on the inner surface of the casing, slow down the corrosion of the casing and parts inside the casing, ensure the normal operation of the unit, and extend the service life of the entire machine.

[0004] The working environment of the turbine unit is quite special. There are vibration fields, wind fields, and variable temperature and humidity environments, which have different impacts on the anti-condensation performance. Therefore, it is necessary to conduct simulation tests on different anti-corrosion processes before implementation to test their anti-condensation performance. Summary of the invention

[0005] The technical problem to be solved by the utility model is to provide a simulation test device for preventing condensation in the internal environment of a hydropower station unit, which can simulate the anti-condensation performance in different environments for anti-corrosion samples of different processes.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is: a simulation test device for anti-condensation of the internal environment of a hydropower station unit, including a temperature and humidity controlled environmental box and a controllable temperature circulating water tank, a chiller cools the water in the controllable temperature circulating water tank, and water inlets and outlets connected to a test bearing water pipe are provided at both ends of the temperature and humidity controlled environmental box, the controllable temperature circulating water tank is connected to the water inlet and the water outlet through a water supply pipe, a water pump is provided on the water supply pipe, different test areas are arranged outside the test bearing water pipe, different test areas are coated with different anti-condensation coating samples, an electronic balance is arranged corresponding to the test area in the temperature and humidity controlled environmental box, a condensation collection tray is provided on the electronic balance, and the temperature and humidity controlled environmental box is placed on a vibration platform.

[0007] In a preferred solution, a temperature and humidity sensor is provided in the temperature and humidity control environment box.

[0008] In a preferred solution, a fan is provided in the temperature and humidity controlled environment box for simulating a wind field.

[0009] In a preferred solution, a wind speed sensor is provided in the temperature and humidity controlled environment box.

[0010] In a preferred solution, the anti-condensation coating sample is coated on the outside of a supporting tube clamp, and the supporting tube clamp is mounted in the test area.

[0011] In a preferred solution, a flow meter is provided on the water supply pipeline.

[0012] The utility model provides a device for simulating the test of the internal environment of a hydropower station unit to prevent condensation, which has the following beneficial effects:

[0013] 1. A temperature and humidity controlled environment box is used to provide a stable and controllable temperature and humidity environment for the test. At the same time, by setting up a vibration platform, the condensation situation in a vibration environment can be simulated, which is closer to the actual use environment.

[0014] 2. Different anti-corrosion coatings are applied to different test areas on the outside of the test water pipe to facilitate comparative testing and help select the anti-corrosion process.

[0015] 3. By applying the anti-corrosion coating on the outside of the load-bearing pipe clamp, it is convenient to replace the load-bearing pipe clamp with the corresponding coating on the outside according to different anti-corrosion processes, which is convenient for replacement without disassembling the entire test load-bearing water pipe, thereby improving the convenience of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the structure of the load-bearing pipe clamp;

[0019] Figure 3 A top view of the test load-bearing water pipe;

[0020] In the figure: temperature and humidity controlled environment box 1, controllable temperature circulating water tank 2, test bearing water pipe 3, water supply pipe 4, water pump 5, electronic balance 6, vibration platform 7, temperature and humidity sensor 8, fan 9, wind speed sensor 10, bearing pipe clamp 11, flow meter 12, chiller 13, condensation collection tray 14, water inlet 101, water outlet 102, test area 301. DETAILED DESCRIPTION

[0021] like Figure 1 As shown, a simulation test device for preventing condensation inside the internal environment of a hydropower station unit comprises a temperature and humidity controlled environment box 1 and a temperature-controlled circulating water tank 2. A chiller 13 cools the water in the temperature-controlled circulating water tank 2 to keep its temperature within the test range. The temperature and humidity controlled environment box 1 can use the QYD-150L alternating humidity and heat test box of Changping, Dongguan, to simulate a humid and hot environment. A sealed door is provided on the front side of the temperature and humidity controlled environment box 1 to separate the test environment from the external environment, and is convenient for opening to replace the anti-condensation coating sample.

[0022] The side wall of the temperature and humidity controlled environment box 1 is provided with a water inlet 101 and a water outlet 102 connected to the test bearing water pipe 3. The water inlet 101 and the water outlet 102 are both provided with connecting flanges, which are convenient for connecting with the water supply pipe 4 and the test bearing water pipe 3. The temperature-controlled circulating water tank 2 is connected with the water inlet 101 and the water outlet 102 through the water supply pipe 4. The water supply pipe 4 is provided with a water pump 5 to form a circulating water circuit. When in use, a chiller 13 is provided on the water supply pipe 4 connecting the water outlet 102 and the temperature-controlled circulating water tank 2 to cool the water. The temperature-controlled circulating water tank 2 is provided with a temperature sensor to facilitate the control of the water temperature in the temperature-controlled circulating water tank 2. The chiller 13 can be selected from Ligong's LG-CY1000 air-cooled chiller.

[0023] The water supply pipe 4 is provided with a flow meter 12, and the flow meter 12 can be a vortex flow meter of a red device to detect the water supply flow rate.

[0024] The test water pipe 3 is made of stainless steel. In this embodiment, Figure 3As shown, the test bearing water pipe 3 is a C-shaped pipe, which is convenient for installation. Different test areas 301 are set on the outside of the test bearing water pipe 3. Different test areas are coated with different anti-condensation coating samples, that is, different test areas 301 adopt different anti-corrosion treatment processes for comparative testing. An electronic balance 6 is set in the temperature and humidity controlled environmental box 1 corresponding to the test area 301. The electronic balance 6 is provided with a condensation collection tray 14 to collect and weigh the condensation. The temperature and humidity controlled environmental box 1 is placed on a vibration platform 7. By setting the vibration platform 7, the simulation test is placed in a vibration environment to simulate the real vibration environment of the turbine generator. The vibration platform 7 can select a Hongda vibration platform.

[0025] During specific use, a fan 9 is provided in the temperature and humidity controlled environment box 1 for simulating a wind field, so that the air in the temperature and humidity controlled environment box 1 is in a flowing state, thereby improving the authenticity of the simulation.

[0026] A temperature and humidity sensor 8 and a wind speed sensor 10 are provided in the temperature and humidity controlled environment box 1. The temperature and humidity sensor 8 and the wind speed sensor 10 are connected to the data acquisition device to facilitate the detection of the ambient humidity, temperature and wind speed in the temperature and humidity controlled environment box 1. The temperature and humidity sensor 8 can specifically be the DHT11 temperature and humidity sensor of Haigu Electronics, and the wind speed sensor 10 can be the wind speed transmitter of Jingxun Changtong.

[0027] Preferably, Figure 2 As shown, the anti-dew condensation coating sample is coated on the outside of the supporting tube clamp 11 , and the supporting tube clamp 11 is clamped in the test area 301 .

[0028] The load-bearing pipe clamp 11 uses a C-shaped pipe clamp, and the end is clamped on the outside of the test load-bearing water pipe 3 by bolts. The opening of the C-shaped pipe clamp is set on the upper side of the test load-bearing water pipe 3, which does not affect the dripping of condensation. The outside of the C-shaped pipe clamp is treated with an anti-corrosion layer according to different anti-corrosion processes. By setting the load-bearing pipe clamp 11, instead of directly performing anti-corrosion treatment on the outside of the test load-bearing water pipe 3, there is no need to dismantle the entire test load-bearing water pipe 3, which is convenient for replacement and comparison.

[0029] The working principle of this device is as follows:

[0030] According to the anti-corrosion treatment process, an anti-corrosion layer is applied to the outside of the load-bearing pipe clamp 11 or the test load-bearing water pipe 3. After drying, the test load-bearing water pipe 3 is installed in the temperature-controlled and humidity-controlled environmental box 1, and the electronic balance 6 is placed below the test area 301. The required test temperature and relative humidity are set. A working ambient temperature and relative humidity are set in the temperature-controlled and humidity-controlled environmental box 1. According to the temperature gradient requirements for condensation formation, the temperature of the temperature-controlled circulating water tank 2 is lower than the ambient temperature of the temperature-controlled and humidity-controlled environmental box 1. The vibration platform 7 and the fan 9 are turned on, and the simulation test begins. As the test continues, condensation water droplets continue to drip into the condensation collection tray 14. The electronic balance 6 records the quality of the received condensation water. After testing for a certain period of time, the condensation conditions under different anti-corrosion processes are compared to select a better anti-corrosion coating or process.

Claims

1. A simulation test device for preventing condensation inside a hydropower station unit, comprising a temperature and humidity controlled environment box (1) and a temperature-controlled circulating water tank (2), wherein a chiller (13) cools water in the temperature-controlled circulating water tank (2), and wherein: The temperature-controlled and humidity-controlled environmental box (1) is provided with a water inlet (101) and a water outlet (102) connected to a test-carrying water pipe (3) at both ends; the temperature-controlled circulating water tank (2) is connected to the water inlet (101) and the water outlet (102) via a water supply pipe (4); a water pump (5) is provided on the water supply pipe (4); different test areas (301) are provided outside the test-carrying water pipe (3); different test areas are coated with different anti-condensation coating samples; an electronic balance (6) is provided in the temperature-controlled and humidity-controlled environmental box (1) corresponding to the test area (301); a condensation collection tray (14) is provided on the electronic balance (6); and the temperature-controlled and humidity-controlled environmental box (1) is placed on a vibration platform (7).

2. A hydropower station unit internal environment anti-condensation simulation test device according to claim 1, characterized in that: The temperature and humidity controlled environment box (1) is provided with a temperature and humidity sensor (8).

3. A hydropower station unit internal environment anti-condensation simulation test device according to claim 1, characterized in that: The temperature and humidity controlled environment box (1) is provided with a fan (9) for simulating a wind field.

4. A hydropower station unit internal environment anti-condensation simulation test device according to claim 3, characterized in that: A wind speed sensor (10) is provided in the temperature and humidity controlled environmental box (1).

5. The anti-condensation simulation test device for the internal environment of a hydropower station unit according to claim 1, characterized in that: The anti-dew condensation coating sample is coated on the outside of a supporting tube clamp (11), and the supporting tube clamp is clamped in the test area (301).

6. A hydropower station unit internal environment anti-condensation simulation test device according to claim 1, characterized in that: The water supply pipe (4) is provided with a flow meter (12).

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